Fuel-saving apparatus



M. WOLFE.

FUEL SAVING APPARATUS. APPLICATION FILED Nov. 29. 191s.

Patented Aug. 10, 1920.

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v nace, stove, or the like, and prevent the' To ZZ 107mm 'it may concern UNITED STATESPATENT OFFICE;

MICHAEL WOLFE, 0F CHICAGG, ILLINOISfASSIGNR, BY MESNE ASSIGNMENTS, TO WOLFF COAL SAVER COMPANY, A CORPORATION OF DELAWARE.

FUEL-SAIING APPARATUS.

Be it known that I, Miei-nien W'oLrn, a citizen the United vStates, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fuel-Saving Apparatus, of which the following is a speciii cation.

My invention relates to fuel saving devices, and more particularly'to the controlling means of such devices. The object of my invention is the provision of simple and efficient means for automatically controlling -the admission of air to the fuel saving device upon operation of the damper or other means controlling the draft from the furnace, or the like, through such device. @ther objects will appear hereinafter.

in embodiment of my invention is shown in the accompanying drawing, forming a part of this specification, and in which- Figure 1 is a fragmental elevation of a heat saving device embodying my invention.

Fig. 2 is a plan view of same.

Fig. 3 is a central vertical section of the device shown in Fig. 1; and

Fig. 4 is an enlarged fragmental view of the device shown in Fig. 3, but showing the air admitting means open.

In the operation of furnaces, stoves, and the like, it is the usual practice to insert dampers in the smoke pipes in order to retard or hinder the draft through the Vfurfuel burning too fast and to prevent consideraole quantities of heat from passing up the chimney. My device contemplates the feeding of air from the outside atmospliere into the smoke pipe between the damper and the furnace, thereby causing such air to be carried down into the furnace, stove, or the like, and support combustion by providing air for oxidizing the partially burned gases in the furnace, stove, or the like.

Referring more particularly to the drawing, I find it convenient to provide a flue member, which in the present instance, has a section 12 which is adapted to lit the smoke-pipe of a furnace, stove, or the like.y

The diameter of section 12 will be governed by the size of the smoke-pipe it is to be fitted to. At the lower end of section 12 I provide a frusto-conical part 13 riveted or otherwise secured to the section 12. The

Specification of Letters Patent. Iatnted Kung 1U, 1920.

Application filed November 29, 1916.

Serial No. 134,027.

member 13 is provided with a plurality of openings 14 which permit the passage of air through said member.

Around the member 12, I provide a casing 15, which in the device' shown is secured to member 13 by rivets 16, forming a substantially air-'tight joint. The casing 15 incloses a heating chamber 17 between the member 12 and casing 15, so that air which passes through the chamber 17 and openings 14 into the fine member is heated by heat absorbed from the 'heated materials in said flue member. I provide openings 42 in the casing 15 which communicate with the outside atmosphere in a manner to permit air to pass into the chamber 17 where it is heated before it passes through the open- -ings 14.

In forming the openings 42, the parts 43 of metal cut out of casing 15, are bent inwardly, Vas indicated in Fig. 4, providing baffle plates for guiding the air upon its entering chamber 17. These plates cause the air to pass upwardly and over against the wall 12 of the flue member, thereby ob taining maximum heating of the air upon its passage through chamber 17, I preferably provide a guide member 44 which fits over the top of casing 15 and is provided with perforations 45 which register with the perforations 42 in casing 15. Member 44 provides a guideway for a tubular member 46 which is provided with openings 47 adapted to register with the openings 45 of member 44. Member 44 is provided with pins 48 which extend outwardly over the top of tubular member 46, preventing upward movement of the latter. lith this arrangement, member 46 is adapted to rotate about the casing 15 on member 44, thereby moving the openings 47 into and out of registration with the openings 45 to control the passage of air into chamber 17. As a means for rotating member 46, I have shown gear teeth 49 formed thereon, and a gear, which in the present instance, is a segmental gear 50, meshing with the gear teeth 49. The gear 50 is fixed on damper spindle 19 by any suitable means, such as the set screw shown. The .arrangement is such that upon operating crank arm 23, the damper spindle 19 is rotated, which in turn moves damper 24 and tubular member 46 to cause the openings 47 to uncover openings 45 and 42, when damper 24 is moved to closed condition. The openings Liand'jf are preferably arranged so that air will not enter chamber 17 until damper 24 is nearly Closed.v

While I yhave illustrated and described the preferred forni of my invention, I do not desire to be limited to the form shown, but desire to avail'myself of such variations and changes as come 'Within the scope of the appendedl claim.

I claim:-

In combination, a flue member having openings therein; a easing encircling the fine memberand inelosing said openings,

there being perforations in said easing opening into the outside atmosphere; a tubular member having perfor-ations therein coperating with the perforations of said easing, the tubular member being mounted for rotation upon the easing and adapted to regulate the flow of air through the perfo- `rations in said easing; a damper spindle mounted in the flue member and said easing; a damper on the damper spindle in l on said'easing upon rotation of the damper spindle and damper.

In testimony whereof I have signed my name to thisspeoifieation on this 27th da;7 of November, A. D. 1916.

' .MICHAEL WOLFE Witnesses: Y

CHARLES M. NIssEN', CHARLES I-I. SEEM.l 

